//DateDriver.java
//test driver of basic Date class of 241

import javax.swing.*;

public class DateDriver
{
    public static void main(String[] args)
    { 
	String command;
	//array of 100 Date objects.  array elements automatically initialized to null
	Date [] theDates = new Date[100];    
	int month, day, year;
	
	do {
	    command = JOptionPane.showInputDialog("Enter command: \n" +
	        " noargctor\n 3argctor\n stringctor\n copyctor\n year\n month\n day\n" +
		" increment\n toString\n equals\n hashcode\n compareTo\n numObjs\n isVaild\n quit");
	
	    if (command.equalsIgnoreCase("3argctor")) {
		month  = Integer.parseInt(JOptionPane.showInputDialog("Enter month"));
		day    = Integer.parseInt(JOptionPane.showInputDialog("Enter day"));
		year   = Integer.parseInt(JOptionPane.showInputDialog("Enter year"));
		System.out.println("Constructor invoked with " + month + " " + day + " " + year);
		theDates[getIndex()] = new Date(month, day, year);
	    }
	    else if (command.equalsIgnoreCase("noargctor")) {   //no arg ctor
		System.out.println("no arg Constructor invoked");
		theDates[getIndex()] = new Date();
	    }
	    else if (command.equalsIgnoreCase("stringctor")) {   //string ctor
		String stringDate = JOptionPane.showInputDialog("Enter date as mm/dd/yyyy");
		System.out.println("Constructor invoked with " + stringDate);
		theDates[getIndex()] = new Date(stringDate);
	    }
	    else if (command.equalsIgnoreCase("copyctor")) {   //copy ctor
		int fromIndex = Integer.parseInt(JOptionPane.showInputDialog(
                                        "Enter index of object to copy from"));	
		System.out.println("copy Constructor invoked with " + theDates[fromIndex]);
		theDates[getIndex()] = new Date(theDates[fromIndex]);
	    }
	    else if (command.equalsIgnoreCase("year"))
		System.out.println("Year is " + theDates[getIndex()].getYear());

	    else if (command.equalsIgnoreCase("month"))
		System.out.println("Month is " + theDates[getIndex()].getMonth());

	    else if (command.equalsIgnoreCase("day"))
		System.out.println("Day is " + theDates[getIndex()].getDay());

	    //to be implemented for homework
	    else if (command.equalsIgnoreCase("increment")) {
		int i = getIndex();
		theDates[i].increment();
		System.out.println("increment invoked: " + theDates[i]);  //new value
	    }
	    else if (command.equalsIgnoreCase("toString"))
		System.out.println("toString invoked: " + theDates[getIndex()]);

	    else if (command.equalsIgnoreCase("equals")) {
		int thisIndex = Integer.parseInt(JOptionPane.showInputDialog(
                                "Enter index of object whose equals method to invoke"));	
		int thatIndex = Integer.parseInt(JOptionPane.showInputDialog(
                                "Enter index of object to be parameter to equals"));	
		System.out.println("equals invoked: " + 
				   theDates[thisIndex].equals(theDates[thatIndex]));
	    }		
	    else if (command.equalsIgnoreCase("hashCode"))
		System.out.println("hashCode = " + theDates[getIndex()].hashCode());

	    else if (command.equalsIgnoreCase("compareTo")) {
		int thisIndex = Integer.parseInt(JOptionPane.showInputDialog(
                             "Enter index of object whose compareTo method to invoke"));	
		int thatIndex = Integer.parseInt(JOptionPane.showInputDialog(
                             "Enter index of object to be parameter to compareTo"));	
		System.out.println("compareTo invoked: " + 
				   theDates[thisIndex].compareTo(theDates[thatIndex]));
	    }		
	    else if (command.equalsIgnoreCase("numObjs"))
		System.out.println("Number of Dates instantiated: " + Date.getNumberDates());

	    //to be implemented for homework
	    else if (command.equalsIgnoreCase("isValid")) {
		month  = Integer.parseInt(JOptionPane.showInputDialog("Enter month"));
		day    = Integer.parseInt(JOptionPane.showInputDialog("Enter day"));
		year   = Integer.parseInt(JOptionPane.showInputDialog("Enter year"));
		System.out.println("isValidDay: " + Date.isValidDay(month,day,year));
	    }
	} while(!command.equalsIgnoreCase("quit"));

    } 
    
    //input int from user that will used as index into the array of Dates.
    //Note that this program is brittle, inputting an invalid int or using an 
    //invalid index or trying to access 
    //an array element that doesn't have a Date object will crash the program.
    public static int getIndex() {
        return Integer.parseInt(JOptionPane.showInputDialog("Enter index of object to access"));
    }
}